US2902035A - Syringe - Google Patents

Syringe Download PDF

Info

Publication number
US2902035A
US2902035A US766587A US76658758A US2902035A US 2902035 A US2902035 A US 2902035A US 766587 A US766587 A US 766587A US 76658758 A US76658758 A US 76658758A US 2902035 A US2902035 A US 2902035A
Authority
US
United States
Prior art keywords
barrel
piston
operating
ring
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US766587A
Inventor
Newell D Hartley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US766587A priority Critical patent/US2902035A/en
Application granted granted Critical
Publication of US2902035A publication Critical patent/US2902035A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00—Medical syringes, e.g. enemata; Irrigators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/02—Burettes; Pipettes
    • B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
    • B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type

Definitions

  • the present invention relates to a syringe of the type having a hollow tube or barrel provided with a restricted orifice at one end and with its other end being open to admit a piston.
  • the piston is movable within the tube to provide pressure for ejecting fluids therefrom or a vacuum for introducing fluid through the orifice into the tube.
  • syringes are generally manufactured with a glass barrel and a glass piston, the outer walls of the piston and inner walls of the barrel are ground to form a sealing fit therebetween, and thus in effect each piston and barrel are mated preventing any intermiXing of the two elements. While these syringes function, such structure is inherently expensive in View of the necessity of forming the sealing fit. In addition, such syringes suffer from the inherent common characteristic of glass, namely being fragile and tending to break even with slight blows.
  • An object of the present invention is to provide a syringe which is economical to manufacture and reliable in use without requiring a sealing fit to be formed between the barrel and the outer walls of the piston.
  • Another object of the present invention is to provide a syringe of the above type which has a fragile barrel and a relatively rigid, non-fragile piston and for the minimization of possible breakage of the barrel caused by the piston moving and hitting the barrel.
  • a further object of the present invention is to enable a barrel of a syringe to have relatively large deviations in dimensions of its inner wall surfaces and to provide a piston with resilient portions which effect a seal therewith irrespective of the deviations, thereby enabling a more economical barrel to be used.
  • a barrel of the type having a restricted orifice at one end, an open end at the other and a piston operable within the barrel.
  • the cross-sectional shape of the inner working portion of the barrel is substantially constant throughout its length, though it may vary within relatively large tolerances for a syringe barrel.
  • the piston has a crosssectional shape which is smaller than the smallest crosssection area of the barrel, and if desired may be many times smaller, it not being essential to the present invention that the working length of the barrel have a constant-shaped or size cross section. Thus a limited amount of movement between the piston and the barrel in a direction perpendicular to the axis of the piston occurs.
  • the piston is provided with a groove adjacent its working end (with the other end being formed to provide a handle) and within this groove there is positioned a ring of resilient material, such as rubber.
  • the normal, outside periphery of the ring is larger than the largest cross-sectional shape of the working length of the barrel and hence upon insertion of the piston within the barrel the ring is compressed and forms a seal between the piston and the barrel.
  • the ring forms, in addition to a seal, a resilient bumper between the two elements at the place where it is positioned on the piston, thereby preventing the piston from damaging the barrel.
  • the handle end of the working portion of the piston has room to move and has a tendency upon such jarring of the syringe to hit the barrel and cause breakage thereof.
  • This is obviated according to the present invention by forming an annular groove adjacent the handle end of the working portion of the piston and positioning within this groove a ring of resilient material similar to that used at the working end of the piston. This ring serves as a resilient bumper between the barrel and the piston to cushion movement of the piston and prevent it from shattering the fragile barrel.
  • the second resilient ring in addition to achieving the above object further aids in preventing breakage of the barrel by the piston during use.
  • the second ring also forms a seal with the barrel; however, this seal only occurs when the piston is almost completely within the barrel. This is decidedly advantageous since, as the piston moves into the barrel and approaches its final position, the second ring causes an additional force resisting movement of the piston which tends to prevent the working end of the piston from hitting the restricted end of the barrel with sufiicient force to break the barrel.
  • a third resilient ring may be positioned between the rings at each end of the working portion of the piston if this portion is relatively long or if there is too much play between the piston and the barrel at intermediate positions of the barrel.
  • Figure 1 is a sectional view taken along an axial section of a syringe constructed according to the present invention.
  • Fig. 2 is a view of the barrel and its resilient members.
  • Fig. 3 is a view taken on the line 33 of Fig. 1 in the direction of the arrows.
  • the syringe of the present invention generally indicated by the reference numeral 10 consists of a hollow barrel 11 and a piston 1'2 operable therein.
  • the barrel ll at one end has inturned portions 13 defining a reduced orifice 14 leading outwardly through a neck 15.
  • a head 16 is formed on the exterior of the neck 15 to increase the sealing engagement thereof with an end portion of a piece of pliable hose 17.
  • the other end of the barrel is open as at 18 and between the opening 18 and the portions 113 the barrel has a substantially circular cross section as indicated in Fig. 3, though, of course, it may be oval if desired.
  • the inner walls of the barrel 11 between the opening 18 and the inturned portion 13 is referred to as the working portion of the barrel since the piston works within this portion.
  • the cross-sectional shape of the Working portion is substantially identical throughout its length; however, it may have relatively large tolerances (for a syringe barrel) to enable a more economical barrel to be used.
  • Flanges l? are formed adjacent the opening 18 to enable the user to grasp the barrel.
  • the piston 12, as shown in Fig. 2, has a working or operating portion which is specifically shown as having a substantially cylindrical length for a distance which is approximately equal to the working length of the barrel.
  • a handle 20 is formed at one end of the working portion of the barrel and may have any shape desired; however, in the disclosed embodiment, it is merely a circular knob connected to the working portion.
  • a radial peripheral groove 21 is formed in the piston adjacent the working end of the piston and a similar portion .ofnthe ebarrel thereby CallSiDg,1.'Wl1H:Ith6f3 rings :1
  • zthew barrelc-ll. is formed-f fragile lmaterial; glass; and the a.
  • piston is formed of anodized aluminum and-hence is :a rigid non-resilient :ma-terial. Wit-h only; a single--O-r1ng adjacent. theworking;.end: of :the .piston-andvwith the piston completely-within the:-ba-rrel,.the other-end of thee:
  • piston adjacent, the opening 118 can move laterally: This movement or-z play is :such. that .inthe-case *whenvrthe syringe is abruptly moved,-- it may.causebreakageofithe barrelby thepiston-hitting it..
  • a syringe comprising a hollow barrel having a restricted. orificeformed in one end'and the other end beingopenanddefining. an opening having a cross-sectional shape,..said barrel having. an operating length with..its inner walls defining .a cross-sectional shape throughout the.. length which. is substantially identical to .thdcross-sectional shape of the opening,- a piston.
  • tion being at least as long as the operating length of the barrel, a peripheral ring -grooveformed in the piston r.- adjacent one end of the operating portion, a second radial peripheral groove formed in the operating portion of the piston and spaced from the first groove a distance slightly less than the operating length of the barrel, and a ring of resilient material positioned and maintained in each groove, the periphenyrof the rings being larger than the periphery of the opening of the barrel and being compressed by the operating length of the barrel upon engagementwtherewith wasathe;operating-length of the piston is inserted into the barrel to cause a seal therebetween:
  • 'A syringew' comprising a -hollow barrel havinga restricted-i-orificetormed: in one end rand the'- other '-end 5 being open and defining anaopening-having a cross sec tionalshape; said barrel havinganoperating length with 11 its inner walls defining a cross-sectional shape throughout the'iengthwhich is substantially identical to the cross-sectional shape: of:the opening; a piston formedof relativelw rigidimaterialihaving an operating portionend-a handle portion extendingfrom-zone end of-the' operatingportiony the 1 length not; the operating: portion :beingat least as long astthe:.operating' length ofrthe barreL -a peripheral 1 ring groove.

Description

Sept. 1, 1959- HARTLEY 2,902,035
SYRINGE Filed Oct. 10, 1958 INVENTOR. NeweZZ D, 17am Z 6) BY M Mk1 ATTORNEYS Unite States The present invention relates to a syringe of the type having a hollow tube or barrel provided with a restricted orifice at one end and with its other end being open to admit a piston. The piston is movable within the tube to provide pressure for ejecting fluids therefrom or a vacuum for introducing fluid through the orifice into the tube.
At present such syringes are generally manufactured with a glass barrel and a glass piston, the outer walls of the piston and inner walls of the barrel are ground to form a sealing fit therebetween, and thus in effect each piston and barrel are mated preventing any intermiXing of the two elements. While these syringes function, such structure is inherently expensive in View of the necessity of forming the sealing fit. In addition, such syringes suffer from the inherent common characteristic of glass, namely being fragile and tending to break even with slight blows.
An object of the present invention is to provide a syringe which is economical to manufacture and reliable in use without requiring a sealing fit to be formed between the barrel and the outer walls of the piston.
Another object of the present invention is to provide a syringe of the above type which has a fragile barrel and a relatively rigid, non-fragile piston and for the minimization of possible breakage of the barrel caused by the piston moving and hitting the barrel.
A further object of the present invention is to enable a barrel of a syringe to have relatively large deviations in dimensions of its inner wall surfaces and to provide a piston with resilient portions which effect a seal therewith irrespective of the deviations, thereby enabling a more economical barrel to be used.
In carrying out the present invention, there is provided a barrel of the type having a restricted orifice at one end, an open end at the other and a piston operable within the barrel. The cross-sectional shape of the inner working portion of the barrel is substantially constant throughout its length, though it may vary within relatively large tolerances for a syringe barrel. The piston has a crosssectional shape which is smaller than the smallest crosssection area of the barrel, and if desired may be many times smaller, it not being essential to the present invention that the working length of the barrel have a constant-shaped or size cross section. Thus a limited amount of movement between the piston and the barrel in a direction perpendicular to the axis of the piston occurs.
In order to form the seal, the piston is provided with a groove adjacent its working end (with the other end being formed to provide a handle) and within this groove there is positioned a ring of resilient material, such as rubber. The normal, outside periphery of the ring is larger than the largest cross-sectional shape of the working length of the barrel and hence upon insertion of the piston within the barrel the ring is compressed and forms a seal between the piston and the barrel.
When the barrel is formed of fragile material, such as glass, and the piston is formed of rigid material, such as atent f Patented Sept. 1, 1959 metal, the ring forms, in addition to a seal, a resilient bumper between the two elements at the place where it is positioned on the piston, thereby preventing the piston from damaging the barrel. However, when the piston is completely or almost completely within the barrel, then the handle end of the working portion of the piston has room to move and has a tendency upon such jarring of the syringe to hit the barrel and cause breakage thereof. This is obviated according to the present invention by forming an annular groove adjacent the handle end of the working portion of the piston and positioning within this groove a ring of resilient material similar to that used at the working end of the piston. This ring serves as a resilient bumper between the barrel and the piston to cushion movement of the piston and prevent it from shattering the fragile barrel.
The second resilient ring in addition to achieving the above object further aids in preventing breakage of the barrel by the piston during use. The second ring also forms a seal with the barrel; however, this seal only occurs when the piston is almost completely within the barrel. This is decidedly advantageous since, as the piston moves into the barrel and approaches its final position, the second ring causes an additional force resisting movement of the piston which tends to prevent the working end of the piston from hitting the restricted end of the barrel with sufiicient force to break the barrel.
While it has been found that one resilient ring is sufficient to form the seal, a third resilient ring may be positioned between the rings at each end of the working portion of the piston if this portion is relatively long or if there is too much play between the piston and the barrel at intermediate positions of the barrel.
Other features and advantages will hereinafter appear.
In the drawings:
Figure 1 is a sectional view taken along an axial section of a syringe constructed according to the present invention.
Fig. 2 is a view of the barrel and its resilient members.
Fig. 3 is a view taken on the line 33 of Fig. 1 in the direction of the arrows.
Referring to the drawing, the syringe of the present invention generally indicated by the reference numeral 10 consists of a hollow barrel 11 and a piston 1'2 operable therein. The barrel ll at one end has inturned portions 13 defining a reduced orifice 14 leading outwardly through a neck 15. A head 16 is formed on the exterior of the neck 15 to increase the sealing engagement thereof with an end portion of a piece of pliable hose 17.
The other end of the barrel is open as at 18 and between the opening 18 and the portions 113 the barrel has a substantially circular cross section as indicated in Fig. 3, though, of course, it may be oval if desired. The inner walls of the barrel 11 between the opening 18 and the inturned portion 13 is referred to as the working portion of the barrel since the piston works within this portion. The cross-sectional shape of the Working portion is substantially identical throughout its length; however, it may have relatively large tolerances (for a syringe barrel) to enable a more economical barrel to be used. Flanges l? are formed adjacent the opening 18 to enable the user to grasp the barrel.
The piston 12, as shown in Fig. 2, has a working or operating portion which is specifically shown as having a substantially cylindrical length for a distance which is approximately equal to the working length of the barrel. A handle 20 is formed at one end of the working portion of the barrel and may have any shape desired; however, in the disclosed embodiment, it is merely a circular knob connected to the working portion.
A radial peripheral groove 21 is formed in the piston adjacent the working end of the piston and a similar portion .ofnthe ebarrel thereby CallSiDg,1.'Wl1H:Ith6f3 rings :1
engage: the. barrel; a compressioinohtheringss;a com-a; pressionzcauses;a seal :betweenvthe ringsxand the: barrel; which im the; case-of .the-..ring:1nearest; the. workingcendsof,
the:-piston:is Sllfi'lClEIli'ztO create a seal between theaba'rrel'il. andithe-piston evenrwith ithe' relatively largextolerancesin. :1
the vcross-sectional:shape of tthe ibarrela It iwillrthusnbezappreciated thamonlyone. :ring (23f)is necessary. lIOCIEEte...
the sealing-fit;
In the: disolosedaembodiment of:the invention zthew barrelc-ll. is formed-f fragile lmaterial; glass; and the a.
piston is formed of anodized aluminum and-hence is :a rigid non-resilient :ma-terial. Wit-h only; a single--O-r1ng adjacent. theworking;.end: of :the .piston-andvwith the piston completely-within the:-ba-rrel,.the other-end of thee:
piston adjacent, the opening 118: can move laterally: This movement or-z play is :such. that .inthe-case *whenvrthe syringe is abruptly moved,-- it may.causebreakageofithe barrelby thepiston-hitting it..
According. to -.-.the.- present; invention;- however, there: silient-iring 24;ser-.ves as a burnperwbetweenthe piston andir the. .barrel' and :obviates breakageg. caused-.zby :lateral :move-:
ment of the piston:
When; in .-=use,: as ..-the. ,piston is introduced:- and forced down thebar-rel towards-the neck portion 15, the only-- resistive force is caused by engagement betweenthei ring 23-1and the. barrel (excluding the effect of any fluid presew sureslsandihence there is a tendency. fort-the piston to :1 maintain its speed andgtothit the portion- .13s With::a.
forceswhich. may. be great enough to break: the portion 13. The ring 24 positioned on the pistons to engagegthe inner .Walls of the barrels .prior to the. piston being: $301111 pletelytwithin the barrel obviatesthis condition -'.by.-in-.-
creasing the resistive force to movement of the piston. Thus. thissecond: ring t24rtendsto prevent the: piston .from hitting the .enchofx the barrel=witht a forceisufficientto break it.
In syringes,.-.which. have.a relatively longworking lengtlnand lsorelativelylong operating lengths .of. the
piston,. it is at,times desirable to addra third resilient member which. may .bean O-ring r25 .positionedbetween Y the:.other..two, preferably centered therebetween .to limit playrofitheltpiston.during, and at its intermediate position.-.. Thisthird .O-ring..which..is similar. to :the rings:
23 and 24 is positioned: and maintainedin a groove 26-.
similar. to the. groovesll and 22 and operates in the samev manneras-thesecond O-ring 24 to perform the.
same; functions.
It will accordinglybe appreciated that there has been disclosed a :syringe that. is relatively economical to manufacture, which. is reliable in use over an extended period andin which the tendency. of a fragile barrel to be broken by. a rigid piston is substantially minimized.
Variations. andmodifications may be made withinthe. scope. of. the. claims andportions of the. improvements may beused without others.
I claim:
1. A syringe comprising a hollow barrel having a restricted. orificeformed in one end'and the other end beingopenanddefining. an opening having a cross-sectional shape,..said barrel having. an operating length with..its inner walls defining .a cross-sectional shape throughout the.. length which. is substantially identical to .thdcross-sectional shape of the opening,- a piston.
formed .of.relatively..rigid. materiaL-having an operating portion and a handle portion extending. from one end of theroperating portion; the; length of'the operating poraaoaoss t p v.
tion being at least as long as the operating length of the barrel, a peripheral ring -grooveformed in the piston r.- adjacent one end of the operating portion, a second radial peripheral groove formed in the operating portion of the piston and spaced from the first groove a distance slightly less than the operating length of the barrel, and a ring of resilient material positioned and maintained in each groove, the periphenyrof the rings being larger than the periphery of the opening of the barrel and being compressed by the operating length of the barrel upon engagementwtherewith wasathe;operating-length of the piston is inserted into the barrel to cause a seal therebetween:
2. A syringe comprising a .barrel .having a hollow cylindrical operating length provided with a restricted orifice formed in one end and the other end being open and defining a substantially circular opening, a piston formed of relatively rigid material to have an operating portion and-a handle'-portion,-the' operatingportionebeing at least as long: as the-length of the hollow operating length of:the-barrel, a radial peripheral groove formed" in the piston adjacent one end'of theoperating=portion;--" a second radial peripheral groove for'medin thei operating-- portion of the-piston and-spaced tro-m-thefirst groove 'a distance slightly less than the operating length of the barrel,- and-a ring ofaresilient material-positioned=andmaintainedin each groove, the'diaimeter of' the rings-beinglarg Y er than-thediameter of:the opening and -being=com-pressedbythe operating :lehgth oft the barrel upon .tengagement therewith asthe operating -length:of the 'pistonis inserted into the barrel to cause a seal therebetween.
3. 'A syringew' comprising a -hollow barrel havinga restricted-i-orificetormed: in one end rand the'- other '-end 5 being open and defining anaopening-having a cross sec tionalshape; said barrel havinganoperating length with 11 its inner walls defining a cross-sectional shape throughout the'iengthwhich is substantially identical to the cross-sectional shape: of:the opening; a piston formedof relativelw rigidimaterialihaving an operating portionend-a handle portion extendingfrom-zone end of-the' operatingportiony the 1 length not; the operating: portion :beingat least as long astthe:.operating' length ofrthe barreL -a peripheral 1 ring groove. formed; in: :the piston uadjacent i one t end -of theoperatingportion', a second-radial peripheral grooveformed in the operatingaportion' ofthe pistonandspaced fromthe firstgroove-a distance; slightly less than=the operating 'lengthzof:the"barrel',-za third peripheral ring" groove formed in rthei-operatingportion of the piston between the other "two gIO0Y6S,ii&Hd' a ring ofxr'esilient material positioned. and a maintained .iILL each; groove; the peripheryof: the rings being larger than the peripheryof the openingof the. --.barrelianddbeing; compressed: by :the operating length of .the; barrehuponengagement:therewith aszthe operating length.of;.the-.piston:.is.inserted into thebarrel-to cause a seabtherebetween:
4. =A.syringe zcomprisingra barrel havinga hOl-IOVTCYHm? drical: operating-lengthiprovided with: a restricted :orifice formed-.in one endaandihe othervendbeing'topen and-de fin-inga. substantially circulanopening, ;a piston aformed'ofij relatively.rigidrmaterialtmhave an-.operating .portionwand a handle. portion, :the; operating portion; being at: least as-long;as-. the length of:the hollow aoperating length ofi the; barrel, :a radialzperipheral groove formed'in the piston": adjacent .one endofrthejoperating portion;. .a second radialr peripheral grooveformedin. the operatingportion of-theiw piston and; spaced;from;the:first:groove a distancezslighta lyllessthan the operatingwlengthi of the barrel', a third :3 radial peripheralxgroove formed; in the operating '.portion,:i of:the pistombetween.the ;other twogrooves,:and:a ring of resilient material. positioned and; maintained in. reach" z..= groove; thei-diameter ofthe; rings ;.being.;larger than; the: diameter of: :the: opening-and beingv compressed by the: operating length .of the barrel :upon engagement ;ther.ewith l5= as the operating length of the piston is insertedinto 11116 barrel to. causeua seal. :therebetween;
5. The invention as defined in claim 1 in which the rings are toroidal having a circular cross-section and are formed of rubber.
6. The invention as defined in claim 1 in which the barrel is formed of glass and the piston is formed from aluminum.
7. The invention as defined in claim 6 in which the rings are toroidal having a circular cross-section and are formed of rubber.
References Cited in the file of this patent FOREIGN PATENTS 19,848 Great Britain July 24, 1913 749,995 France May 15, 1933 974,009 France Sept. 20, 1950
US766587A 1958-10-10 1958-10-10 Syringe Expired - Lifetime US2902035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US766587A US2902035A (en) 1958-10-10 1958-10-10 Syringe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US766587A US2902035A (en) 1958-10-10 1958-10-10 Syringe

Publications (1)

Publication Number Publication Date
US2902035A true US2902035A (en) 1959-09-01

Family

ID=25076886

Family Applications (1)

Application Number Title Priority Date Filing Date
US766587A Expired - Lifetime US2902035A (en) 1958-10-10 1958-10-10 Syringe

Country Status (1)

Country Link
US (1) US2902035A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277894A (en) * 1963-10-11 1966-10-11 Alexander Adolphe Syringe package having parts of different hardness
US3343539A (en) * 1964-10-22 1967-09-26 Moorhouse Turkey Hatchery Inc Piston type artificial insemination syringe having stroke adjusting means
US3785533A (en) * 1970-04-29 1974-01-15 Becton Dickinson Co Coombs serum cartridge with indexing means
US4030498A (en) * 1974-10-25 1977-06-21 Baxter Travenol Laboratories, Inc. Syringe
US4248228A (en) * 1979-10-19 1981-02-03 Jules Silver Disposable enema syringe for one hand use
EP0141083A1 (en) * 1983-08-29 1985-05-15 Dentsply International, Inc. Dispenser for flowable material
US4941873A (en) * 1979-07-25 1990-07-17 Ultradent Products, Inc. Controlled diffusion medicament applicator
US4997371A (en) * 1988-06-22 1991-03-05 Honda Giken Kogyo Kabushiki Kaisha Dental agent applicator
WO1991015164A1 (en) * 1990-04-06 1991-10-17 The Upjohn Company Applicator having two cannulas
US5269684A (en) * 1992-08-31 1993-12-14 Ultradent Products, Inc. Adjustable brush delivery tip with secondary flow path
US6074370A (en) * 1991-12-23 2000-06-13 Syringe Development Partners L.L.C. Safety syringe
US20070142792A1 (en) * 2005-12-16 2007-06-21 Terrill Matthew J Medical device for delivery of liquids
DE102007034477A1 (en) * 2007-07-20 2009-01-22 Voco Gmbh Syringe and method for metered dispensing of materials
DE202006020555U1 (en) 2006-01-05 2009-01-29 Glindemann, Dietmar, Dr. All-glass syringe
DE102008058034A1 (en) * 2008-11-18 2010-05-27 Imp Pape Gmbh & Co. Kg Piston syringe for use as storage container for pharmaceutical preparations in infusion apparatus, has ring provided between piston and body, and needles/hose connection, closure and piston made of polyetherimide, polysulfone or copolymers
DE102008062405A1 (en) * 2008-12-17 2010-11-18 Lts Lohmann Therapie-Systeme Ag Injector with cylinder-piston unit and permanently sterile active piston skirt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR749995A (en) * 1933-02-03 1933-08-02 Syringe enhancements
FR974009A (en) * 1948-07-22 1951-02-16 Improvements to injection syringes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR749995A (en) * 1933-02-03 1933-08-02 Syringe enhancements
FR974009A (en) * 1948-07-22 1951-02-16 Improvements to injection syringes

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277894A (en) * 1963-10-11 1966-10-11 Alexander Adolphe Syringe package having parts of different hardness
US3343539A (en) * 1964-10-22 1967-09-26 Moorhouse Turkey Hatchery Inc Piston type artificial insemination syringe having stroke adjusting means
US3785533A (en) * 1970-04-29 1974-01-15 Becton Dickinson Co Coombs serum cartridge with indexing means
US4030498A (en) * 1974-10-25 1977-06-21 Baxter Travenol Laboratories, Inc. Syringe
US4941873A (en) * 1979-07-25 1990-07-17 Ultradent Products, Inc. Controlled diffusion medicament applicator
US4248228A (en) * 1979-10-19 1981-02-03 Jules Silver Disposable enema syringe for one hand use
EP0141083A1 (en) * 1983-08-29 1985-05-15 Dentsply International, Inc. Dispenser for flowable material
US4997371A (en) * 1988-06-22 1991-03-05 Honda Giken Kogyo Kabushiki Kaisha Dental agent applicator
WO1991015164A1 (en) * 1990-04-06 1991-10-17 The Upjohn Company Applicator having two cannulas
US20040064106A1 (en) * 1991-12-23 2004-04-01 Pressly William B. S. Safety syringe
US6074370A (en) * 1991-12-23 2000-06-13 Syringe Development Partners L.L.C. Safety syringe
US6605073B1 (en) 1991-12-23 2003-08-12 Medsafe Technologies, Llc Safety syringe
US20060122564A1 (en) * 1991-12-23 2006-06-08 Medsafe Technologies, Llc Safety syringe
US5269684A (en) * 1992-08-31 1993-12-14 Ultradent Products, Inc. Adjustable brush delivery tip with secondary flow path
US20070142792A1 (en) * 2005-12-16 2007-06-21 Terrill Matthew J Medical device for delivery of liquids
DE202006020555U1 (en) 2006-01-05 2009-01-29 Glindemann, Dietmar, Dr. All-glass syringe
DE102007034477A1 (en) * 2007-07-20 2009-01-22 Voco Gmbh Syringe and method for metered dispensing of materials
US20090047622A1 (en) * 2007-07-20 2009-02-19 Voco Gmbh Syringe and Method for Dosed Dispensing of Materials
US8641416B2 (en) 2007-07-20 2014-02-04 VOCCO GmbH Syringe and method for dosed dispensing of materials
DE102008058034A1 (en) * 2008-11-18 2010-05-27 Imp Pape Gmbh & Co. Kg Piston syringe for use as storage container for pharmaceutical preparations in infusion apparatus, has ring provided between piston and body, and needles/hose connection, closure and piston made of polyetherimide, polysulfone or copolymers
DE102008058034A8 (en) * 2008-11-18 2012-03-08 Imp Pape Gmbh & Co. Kg Syringe as a storage container for ready-to-use pharmaceutical preparations and syringe set
DE102008058034B4 (en) * 2008-11-18 2014-05-15 Imp Pape Gmbh & Co. Kg Use of a syringe as a storage container for ready-to-use pharmaceutical preparations and syringe set
DE102008062405A1 (en) * 2008-12-17 2010-11-18 Lts Lohmann Therapie-Systeme Ag Injector with cylinder-piston unit and permanently sterile active piston skirt
US20110238015A1 (en) * 2008-12-17 2011-09-29 Rudolf Matusch Injector having a cylinder-piston unit and permanently sterile active piston skirt
US8394069B2 (en) 2008-12-17 2013-03-12 Lts Lohmann Therapie-Systeme Ag Injector having a cylinder-piston unit and permanently sterile active piston skirt

Similar Documents

Publication Publication Date Title
US2902035A (en) Syringe
US2895773A (en) Variable diameter tensed ring piston
US3029987A (en) Spout with frangible diaphragm for caulking cartridge
US4031893A (en) Hypodermic injection device having means for varying the medicament capacity thereof
US3358869A (en) Vacuum sealing plug
US2348337A (en) Hypodermic projectile
WO2002045780A3 (en) Syringe barrel and plunger assembly having ellipsoidal configurations
US5075998A (en) Gun cleaning rod with swivel handle
IE36697B1 (en) Improvements in or relating to infusion cannula assemblie
US3379196A (en) Three-piece medicine dropper tube with improved sealing connection
US2687730A (en) Ampoule
US2902034A (en) Plastic syringe plunger
US3135260A (en) Plastic syringe
US20040232369A1 (en) Vacuum pressure regulating valve
US3093318A (en) Adjustable nozzle
AU728691B2 (en) Duckbill valve
EP3369103B1 (en) Vacuum interrupter with one movable contact
US2874996A (en) Nozzle device
US10539125B2 (en) Manual pump
US3028036A (en) Bung or stopper
CA2475278C (en) Syringe
US852065A (en) Syringe.
US3173369A (en) Explosive shell for powder actuated tool
KR102272092B1 (en) Power compressor for toilet bowl
US2835304A (en) Tubeless tire valve